K4Fe(CN)6 - Potassium Ferrocyanide

What is Potassium Ferrocyanide?

Potassium ferrocyanide is an inorganic compound with the chemical formula K4Fe(CN)6. Potassium ferrocyanide is also known as yellow potash prussiate, a yellow crystal. It was made with wool or horn clippings stirring hot potassium carbonate with an iron rod. Potassium ferrocyanide was used for certain iron processes as a developer and as an additive for developers of alkaline pyro.